Brake system



C. FROESCH BRAKE SYSTEM 2 Sheets-Sheet' Filed March 2l, 1924 FINN...

. Famed Feb. 1e, 1926.

UNITED STATES PATENT oFFlcE.

l CHARLES FROESCH, F NEW YORK, N. Y., ASSIGNOR TO INTERNATIONAL MOTOR COM- 4 PANY,. OF NEW YORK, N. Y., A CORPORATION'OF DELAWARE.

BRAKE SYSTEM.

Application lled March 2i, 1924. Serial No. 700,757.

To all whom t may concern:

Beit known that I, CHARLns FRonsoH, a 4 citizen of the United States, residing in the borough of Manhattan, of the city of New 5 York, inthe State of New York, have invented certain new and useful Improvements in Brake Systems, of which the following is la specification, reference being had to the accompanying drawings, form- I ing a part hereof.

- This invention relates to brake operating mechanism and more particularly to brake operating mechanism for motor vehicles actuated by fluid pressure. It has heretofore been proposed to actuate brake mechanism by fluid pressure through the operation of a pump driven from a moving part of the vehicle and constantly drawing fluid from a reservoir and returning the. fiuid to the reservoir except whenthe brakes are to beoperated when the flow of fluid from the pump is diverted to the brake operating mechanism. The present invention seeks to incorporate such a system with existing units of a motor vehicle in the interest of economy of space and a reduction in the number of parts. Accordingly the pump is incorporated with the change speed gearing in the transmission housing and the housing is utilized as the reservoir for the fluid. The invention also seeks to utilize the aforesaid relation of parts to provide a positive lubricating system for the, transmission. Accordingly a lubricating medium. is employed as the fluid and the pump and its associated parts are so disposed that the lubricating medium which is constantly returned to the reservoir when the brake operating mechanism is not functioning, is directed upon the various moving parts of the transmission, effecting their lubrication. These and other objects of the invention will be apparent from the following description of a preferred embodimentof the invention illustrated in the accompanying drawings. In the drawingsr 4 AFigure 1 is a view representing somewhat schematically the transmission housing and change speed gears of a motor vehicle and showing the incorporation 'of Huid pressure actuating-mechanism for the brake operating devices.

.vehicle is in motion.

"l Figure 3 is a fragmentary View showing a nozzle which may lbe used to direct the' lubricating medium upon the enmeshing teeth of change speed gears.

In the drawings the transmission housing and the change speed gears havebeen shown in outline as the invention is not" limited to any particular type of transmission and only so much of the same has been illustrated as is necessary to an understanding of the invention. The transmission housing is' indicated at al and a pair of intermeshing change speed gears at b, b, the

gear b being shown as mounted upon the transmission shaft c of, the transmission which. is constantly turning whenever the The lower part, of the transmission housing a is so formed as to providey a reservoir a of considerable volumetric capacity, the normal height of the lubricating mediu-.mth'erein being indicatedby the dotted line a2. Mounted upon the transmission shaft c and keyed or`otherwise rigidly secured| thereto is one of a pair of intermeshing gears c, c2 forming the pump of the present invention, the stub shaft c3 carrying the co-operating gear c2 being journaled in any convenient manner in a housing d which may form a part of or be secured to 'an end wall of the transmission housing. Leading from a low point in the reservoir a is a conduit d serving as an intake for the pump, the liquid being drawn from the reservoir through the conduit el under the action of the pump whenever the transmission shaft c rotates and being delivered by the pump into an outlet conduit d2. The conduit Z2 leads directly to a pair of fluid pressure cylinders e and containing pistons e', f', respectively,the piston rods of which are connected in the anism (not shown)` at therear and front I 5- in'gfthecoiidu'itio2 and :onduct-ing:` the fluid to pressure'cylinders located at It is' preferred that 'by-pass a/Ibe O-flisposed terminates in passage` it@ h ajtfin tyo Youtlets` h2 Ato per" 20H zThepump 4Will operate continuously whenfluidwillbe' pumped" totlie cylinders e convenient m'aii'ncr as by 4a toot Apedal or;

and v(lrdinarily, 'howeifiei the reaction` of the .pistons' ef, will befsiiiicient, due t'o l. .'.ttheir connections `with the brake operating, 25 meehanisin' to. s etup,-l an appreciable.; degree lof-back pressureagaiiisttlie piiinp.f .Tliis will 'cause the liiuidrin the' conduit' d? to 'take the easiest path and totlow through .the outlet-g intothe by-pass h vfojr return4 to the. 'reservoir'.A When, however, itisde-l'; siied to operate the brakes, orifice g may be closed by means of valve' g I`a` ctuated .in any the like(not shown) from th-edrivers scati It Will-be-appai'ent that when the orifice is closed'by the valyeg all ofthe-fluid will order to r'e'dulate the application of brak-ing ing intot e b'ypassflaVv The point at which the Valve-- eperates to reduce tlieprossuiofin the icyliI-iders being regulated by anyv con-- venient regulating-device,"in the present instance,.5`a1 plugy el determining the-conrpressi'on' o fjthe ball 3.

v Itwill be obvious that the fluid pressiire cylinders actuating the brake operatin@r mechanism need not be disposedinfclose proximity tofthe transmission housing butA equivalentjresults may be obtained by dividthe respecthe vehicle V tive. .Sii/213512151 0 "Varidusinodiications maybe made in the airangement andA disposition of .the co operatingparts a'ndfno limitation is intended n bythe'- foregoingldescription lexcept as" in.

dieatdlintli'e appended claims.

.L 'Whatlclaim is:+ w

.I-Thefcombination With'a transmission ,and-change speed gears, of ja reserif as to conductitlie lubricatingniedi'uintr=the upper'- portion'of the housinga. Wheretvconnections betWeenthepiSto spring'z'- bearing upon the waffiemed maximising- .and '5 me.

w; Huid from 'aie reservo-ir and# a fi 'e sears.

meclianijsman i of the gears? I The' minbination witnaU-tr-aii'smis on?f v'ever the-transmissionfishaft,.is turn-ing` anditifupeiijiiie insect-assiemef-Siiiiieegi e-rvoirv to the pump and .means o i conductsion ting reservoir toi` the -`:pump', means to iconduc't'ig operating.' mechanism.

to 'conduct vlud from. the-reservoir' to` tlie "1:06

pump, inea-iis toconduct'iuid' fromthe pump',

vpuinl'o tothe f tothe liiid pressure brake operating mech-ff anism, and al bvlpassvfo-r the Huid fronrtlie operating mechanism, offa'f'- reservoir formed.

in Athe,` housing, a pump actuated :by the transmission shaft, a Huid pressure cylinder,

a conduit to confdiiet-iuid from; the reservoir 7. The lc ongibination wit-h a transmission housing, change speed gears and, af: trans-l mission 'shaft in the housing. and brake oper-ating mechanism, of a reservoir formed viiithe housing, a fpump `a ctuated by the i transmission shaft, a Huid pressure cylinder,

a. conduit tofconduct Huid frointhe reservoirA to the-pump` a conduitjto conductiu'id-from thejpufmp to the cylinder, a. by-pass from the pump to the reservoir througlithe interenraging surfaces of .the gearsand connections between tliecylinder and the brake operating mechan ism;

8. The combinationwith tif-transmission;

housing, change speed gears anda transmission shaft in the housing and brake operating mechanism, of Aa reservoir formed in the housing, a pump actuated by the transmission shaft, a fluid pressure cylinder, a conduit to conduct a lubricant from the reservoir to the pump, a conduit to conduct lubricant from 'the pump to the cylinder, a by-pass directing lubricant on the gears and connections between the cylinder and the brake operating mechanism.

housing, change speed gears and a transmission shaft in the housing and brake operating mechanism, of a reservoir formed in the housing, a pump actuated by the transmission shaft, a fluid pressure cylindery having a piston, a conduit. to conduct lubricant from the reservoir to the pump, a conduit to conduct lubricant from the pump tov the cylinder, a by-pass leading from the last mentioned conduit to the reservoir, a valve to control the flow of lubricant to the by-pass, a check valvebetween the last mentioned conduit and the by-pass, and connections between the piston and the` brake operating mechanism.

l 11. In la motor vehicle, the combination yvith a transmission housing, change speed gears and a transmission shaft in the housing, front wheel brake operating mechavnism and rear wheel brake operating mechanism, of a reservoirformed in the bottom of the housing, a pump actuated bythe transmission'shaft, a fluid ,pressure cylinder having a piston of major diameter, connections'between said piston and the rear wheel brake operating mechanism, a second fluid pressure cylinder having a piston of minor diameter, connections between said last named piston and the front wheel brake 4operating mechanism, a conduit between the reservoirand the pump, a conduitv between the pump and the two cylinders, a distributing conduit in the upper part of the housing, nozzles formed in the distributing con-- duit to direct lubricant upon the gears, a by-pass,` between the second mentioned conduit and the distributing conduit, a manually operable valve controlling the flow of lubricant from the second mentioned conduit to the bypass and a check valve between said second mentioned conduit and the pass.

12. The combination with a transmission housing and remote actuating mechanism, of a reservoir formed in the housing, a pump and fluid pressure cylinder having a piston` means to conduct fluid from the reservoir to the pump, means to conduct iuid from the pump to the cylinder and the interengaging surfaces of the gears, and connections between the piston and the actuating mechanism.

13. The combination with a transmission housing and remote fluid pressure actuating mechanism, of a reservoir formed in the housing, a pump" to draw fluid from the reservoir and direct it to the remote actuating mechanism and the interengaging surfaces of the gears.

14. The combination with change speed gears and a housing therefor, of a reser- Voir, a pump, means to conduct fluid from the reservoir to the pump, and means to conduct fluid from the pump to the intei'- engaging surfaces of the gears.

15. The combination with a transmission housingand fluid pressure brake operating mechanism, of a reservoir, a pump to draw fluid from the reservoir and direct-it to the brake operating mechanism and means to by-pass the fluid to the interengaging surfaces of the gears.

1G. The combination with change speed `gea`rs and a housing therefor, of a reservoir, -relatively remote actuating mechanism, a

pump to draw fluid from the reservoir and direct it to the relatively remote actuating'.

mechanism and means to by-passthe fluid to the interengaging surfaces of the gears.

17. The 'combination with a transmission housing and relatively remote actuatingmechanism, of a reservoir, a pump, a fluid pressure cylinder having a piston, means to conduct fluid Pfrom the reservoir to the pump, means 'to conduct lfluid from ,the

pump to the cylinder, and connections be?` tween the piston and the relatively remote actuating mechanism and means to by-pass the fluid to the interengaging surfaces ofthe gears. y

18. The combination of a transmission housing and a relatively remote actuating mechanism of a reservoir, a pump, means to conduct fluid from the reservoir to the and'means to conduct fluid selectively to the remote actuating mechanism andfto the nterengaging surfaces of the gears.

1'9. The `combination of a transmission housing and a relatively remote actuating mechanism of a reservoir, a pump, means to conduct fluidv from the reservoir to the pump, means `to selectively conduct fluid from the pump to' the remote mechanism and the interengaging surfaces of the gears and means to prevent excess pressure be'- Pump . t'weenthe pump and the remote mechanism.

pump, means to selectively conduct fluid from the pump to the remote mechanism 'March, A. D. 1924.'

and the interengaging surfaces of the gears and means for limltlng the pressure between the pump and remote mechanism including l0 means to conduct Huid to thel gears. Y

This specicatin signedA this 17th davy of CHARLES FROESCH. 

